blue spot on lcd screen brands

If you’re someone who is an avid TV user then you may have come across a problem where you see tiny blue dots on your TV screen which may have had you in confusion as to what caused them in the first place and how you can get rid of them to get back to watching TV on a flawless screen.

Don’t be concerned if you detect blue spots or dots on your television. This issue is known to occur on the majority of LCD TVs and is really simple to resolve. The blue specks (dots) you see are the light from your TV’s LED backlight.

Some pieces within the TV may migrate from their original location as a result of repeated use or poor quality, causing blue spots or dots to appear on the screen.

What you may be seeing is one or more of the more than 2,000,000 dots that make up the LCD or OLED screen’s composition. These dots (sometimes referred to as pixels) might be red, green, blue, white, or black.

To maintain a high quality of operation, these LCD/OLED screens are manufactured using high-precision technology. However, regardless of the manufacturer, there may be a tiny number of dots that do not change color on all LCD/OLED panels. This is a common phenomenon with all LCD/OLED screens from all manufacturers, and it is inherent in the technology. Most of the time, these dots remain on the screen but are only visible when an all-white or all-black image is displayed and should not be seen under normal viewing conditions.

If your TV screen has blue spots, it might be due to a manufacturing flaw in the blue LED backlight. In this situation, you will need to change your backlight.

Sometimes the blue spots may appear in a purple tone too and these purple-colored spots are created by the HDMI cable connection from the cable box. These purplish-blue hue spots can be removed by doing the following steps:Check that the HDMI wires are securely hooked into or linked to your TV.

Whether or not you have previous experience repairing TVs or electronics, I believe you will be able to fix your TV and remove the blue spots on your TV screen if you follow the directions below. You’ll need to unscrew your LCD TV and use glue to reattach the fallen reflectors back into position. All you need to do is just follow the following steps and you’ll be able to fix this problem without the need for help from a technician.Turn off your television and unplug it from the power supply.

To add adhesive to the Q-tips, use them. (Apply glue around the area where the reflector has fallen) After applying adhesive, set the reflector in position and hold it in place until it is squeezed.

The issue of blue spots or dots is not new, and it can show on practically any LCD or LED TV, whether brand new or secondhand. We have previously stated in this post that this problem is simply fixed and that you do not need to be concerned.

Keep in mind that if your TV is still under warranty, you should call a service facility and let them resolve the situation. They have greater knowledge of these kinds of issues and will repair your TV for free.

You can unscrew the TV to examine whether the reflecting lenses have come loose, and then use super glue to reattach them. If you believe you won’t be able to solve the problem on your own, contact a TV service specialist and delegate the task to him. I hope we were able to assist you in some way and that you were able to fix the problem with blue dots.

SecretCeremony from what I"ve read it looks like voltage issues on the LED driver board that control the LED"s. I would start with a new main board (yes I"d buy it from somewhere where I can return it in case it does not work) then re-evaluate on that.

The LCD panel will be connect to a driver board that is part of the panel, take a look on that one and see what you find. Post some good images of that board with your question so we may be lucky and find some sort of schematic etc. I would even contemplate on getting a universal driver for the panel just to see if the same issues are present when every board from the TV is disconnected. Sounds like a lot of work and maybe even some $$$ foolishly spend but I do not like to concede defeat.

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Keep in mind that any LCD or LED monitor/TV is bound to have at least 1 dead/stuck pixel. Most companies will not entertain replacement unless its a certain amount or in a particular area.

Once you have found the correct part number, see HP Consumer Notebook PCs - Ordering HP certified replacement parts. Use the instructions in this document to order a replacement part.

HP recommends that you only order parts from an authorized HP repair parts dealer. Parts ordered from third-party companies might not perform as expected and might cause additional

Short for picture element, a pixel is a single point in a graphic image. HP TouchSmart PCs, All-in-One PCs and LCD flat panel monitors display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are placed close together so that they appear connected.

A full pixel defect is a bright white dot or very noticeable black dot on the display. No full pixel defects are allowed per HP"s monitor specification.

A different type of defect caused by microscopic contaminants within the manufacturing process can also be found. Contamination results in a dark "stain" covering one or several sub-pixels. They are not pixel or sub-pixel defects per say. No contamination is allowed under HP policy.

Bright sub-pixel defect - In this image, a bright spot on a black background is caused by sub-pixels (in this case, a red sub-pixel) in the "on" state.

Debris trapped within the LCD structure can result in dark spots, but under magnification these are distinguished from an "off" sub-pixel, as the shape of the contaminating particle is visible.

There are endless technical arguments for determining which screens are the best, but if you set price aside, the deciding factor usually comes down to which screen produces the best visuals — the most accurate depiction of the world as we see it with our own eyes.

Leading screen manufacturers like Samsung have turned to nanotechnology that, ironically, can’t even be seen by the naked eye but produces jaw-droppingly rich, vibrant displays. An emerging technology called Quantum Dot enhances flat-panel LED displays, commercial TVs and curved widescreen monitors, revealing many more colors and adding the necessary brightness to take full advantage of technologies like High Dynamic Range (HDR).

Quantum Dots are essentially nanoparticles that manufacturers add to the layers of films, filters, glass and electronics — sometimes called the sandwich — that comprise a Liquid Crystal Display (LCD). When these Quantum Dots are illuminated, they re-emit light of a certain color. Developing the technology for the primary QLED colors (red, blue and green) has been a technological feat, and one Samsung has overcome with its R&D hub Samsung Advanced Institute of Technology (SAIT). The team successfully developed blue QLED technology in 2020.

Because of its investment in R&D, Samsung is, by far, the market leader in Quantum Dots development and display products, with a category it calls Quantum LED (QLED). Other display manufacturers using Quantum Dots technology often include “Q” or “Quantum” in product names to make the distinction from conventional LCDs.

Quantum Dots-enhanced displays compare favorably with super-premium Organic LED displays (OLEDs), but usually at less cost, and with none of the technical issues and limitations that OLED introduces (more on that later). Quantum Dots technology first found its way into the premium TV market, and is now increasingly being used by image-sensitive brands for commercial applications such as digital signage, where the depth and accuracy of color is critically important.

What is Quantum Dot technology? A Quantum Dot is a human-made nanoparticle that has semiconductor properties. They’re tiny, ranging in size from two to 10 nanometers, with the size of the particle dictating the wavelength of light it emits, and therefore the color. When Quantum Dots are hit with a light source, each dot emits a color of a specific bandwidth: Larger dots emit light that is skewed toward red, and progressively smaller dots emit light that is skewed more toward green.

Quantum Dots are usually applied to a sheet of film that sits as a layer in that “sandwich” in front of the LED backlight that’s used to illuminate an LCD. The light passes through the LCD display stack, with the Quantum Dot color filter layer enhancing and enabling the LCD to reveal a wider and more saturated range of colors than would otherwise be possible.

Many consumer and B2B brands place heavy importance on how their products look to the marketplace. Their brands’ colors are not just blue and red — they are very specific blues and reds. Brand owners often have rigorous guidelines that mandate how these colors are reproduced, and in the case of digital displays, Quantum Dots technology provides the level of accuracy they want. Samsung’s QLED displays, for example, enable more than a billion colors.

By one estimate, Quantum Dots increase the color gamut on LCD displays by up to 50 percent. That broad range of colors also enables more saturated colors — the vivid, intense color levels that “pop” on screens and draw viewer attention.

Using Quantum Dots means the range of colors and their accuracy is maintained even at peak brightness, while other display technologies like OLED might wash out colors when scenes require full brightness. The result with QLED is accurate, rich and detailed colors on displays, in any light.

Quantum Dots LCD displays are often compared to OLED flat panel displays, with both billed as premium visual experiences. To a casual observer, they can look very similar, but there are distinct differences.

In pure technical terms, they’re different in that LCDs are illuminated by integrated but distinct LED lighting arrays, whereas OLEDs are self-emissive — each pixel is its own light.

Both technologies offer a huge range of colors, delivering eye-popping visuals. But while Quantum Dots can reproduce that full range of colors even at peak brightness, when the image on an OLED display becomes too bright, its color capabilities are compromised, and diminishing the available spectrum. Samsung QLEDs have peak brightness levels as high as 4,000 nits, which is brighter than what’s needed for outdoor displays to overpower the glare of direct sunlight.

While a QLED will provide consistent color expression throughout its operating life, the organic material driving an OLED will fade (in technical terms, lose that color expression) as it ages. OLEDs — particularly running at high brightness — are also more susceptible to burn-in, or ghosts of images or text left when a screen element (such as a logo) stays up for too long.

When flat panel displays first came into the marketplace, much of the marketing story and buyer interest focused on their shape and scale. Then the focus turned to resolution, shifting from 720p to 1080p HD and then to 4K and even 8K.

Size and pixel counts are important, but in many respects the real determining factors for brands and business users is visual quality. The real benefits of Full HD, Ultra HD and beyond come when a display can deliver that volume of detail with an exceptional depth of color, no matter the visuals. Samsung’s QLED technology is supported by AI-powered machine learning, which can scale 4K UHD and Full HD content to 8K resolution without compromising quality.

Quantum Dots may seem like a term that could only excite nerds, but one look at a QLED display will generate admiration even from people who don’t want to know all the technical details.

Although Yellow/Green Character LCD Display modules have been in use for many years, the release of the color blue character lcd has more people integrating this older technology into newer product designs.

Below are two character display modules, sometimes referred to as alphanumeric LCD displays. Both are 16x2, wide temperature, bottom view. The one on the left is a STN, yellow/green background with yellow/green LED backlight. The display on the right is a FSTN, negative mode, blue background with white backlight.

The blue character LCD Display with white LED backlight combination makes the display stand out. There is very little cost difference between the yellow/green and blue and lead time is the same. There are a few concerns with moving from an older yellow/green configuration to a blue/white.

Negative mode blue character displays with a white backlight are easier to read in low light situations. But there are a few concerns that designers need to be aware of.

The first is the backlight; it must be on to read the display. The backlight drains more power (15mA and greater) then the LCD. This makes it a poor choice for a battery powered products.

If your product will always be in low light or no light situations, then you have no choice and should go with the negative mode blue, but if your display will operate in bright ambient light and power drain is a concern, you might want to steer clear of these.

Another issue with negative mode, blue character LCD’s is its hot spots. A hot spot is where the backlight is brighter is some areas, and dimmer in other areas. Negative mode LCD Displays with a white LED backlight will produce the most noticeable hot spots.

That annoying dead pixel on your TFT, OLED, or LCD screen might just be stuck and easy to fix. We"ll show you how to do it. You can still return your monitor if this doesn"t work; nothing we recommend here will void your warranty.

Yes, you should test any new monitor for bad pixels. You can simply run your screen through a palette of basic colors, as well as black and white in full-screen mode using a tool like EIZO Monitor Test.

EIZO Monitor Test is an online tool that lets you find and eventually fix stuck pixels. It packs many options into a single test window, but it"s easy to use once you have an overview.

To test your screen, check all the boxes you want to include in your test. We recommend the default setting of having all boxes checked. If you"re testing multiple monitors, you can open the test on an additional monitor. When you"re ready, click Start test to launch the full-screen test window.

Below you see the first test pattern. Each screen has an explainer in the bottom right detailing what you should look for. Next, you"ll see a menu that lets you go from one test to the next on the left. Move through the black and white screens and all the solid colors (green, blue, and red) and check our screen. To exit, press the ESC key or the exit symbol in the top right.

This is a very thorough test not only meant to identify bad pixels but also powerful enough to test the quality of your monitor. Unfortunately, with Flash no longer supported by most browsers, you"ll probably have to use the executable version to make it work.

Move the mouse to the top of the test window, and a menu will appear. There is an info window that you can turn off with a button in the top right corner of the menu. Then click on the Homogenuity test point and move through the three colors as well as black and white.

Fingers crossed, you won"t discover anything out of the ordinary. In the unfortunate case that you do, let"s see whether it"s a stuck or a dead pixel and what you can do about it.

A stuck pixel, sometimes wrongfully referred to as a hot pixel, is defective because it receives incomplete information. Hence, it appears in one of the colors that its three sub-pixels can form, i.e., red, green, or blue. Strictly speaking, hot pixels only appear in digital cameras when electrical charges leak into the camera"s sensor wells. Sometimes, stuck pixels fix themselves.

The tool will load a black browser window with a square of flashing pixels. Press the green button in the bottom right to go full-screen. Drag the flashing square to where you found the stuck pixel and leave it there for at least 10 minutes.

UDPixel, also known as UndeadPixel, is a Windows tool. It can help you identify and fix pixels using a single tool. The program requires the Microsoft .NET Framework. If you"re not on Windows or don"t want to install any software, scroll down for the online tools below.

Should you spot a suspicious pixel, switch to the Undead pixel side of things, create sufficient amounts of flash windows (one per stuck pixel), and hit Start. You can drag the tiny flashing windows to where you found odd pixels.

The PixelHealer lets you flash a combination of black, white, all basic colors, and a custom color in a draggable window with customizable size. You can even change the flashing interval and set a timer to close the app automatically.

Let it run through all colors in Auto mode to spot whether you have any weird pixels on your screen. If you do, start the fix, which will rapidly flash your entire screen with black, white, and basic color pixels.

Should none of these tools resolve your stuck or dead pixel issue, here is one last chance. You can combine any of the tools detailed above and the magic power of your own hands. There is a very good description of all available techniques on wikiHow. Another great step-by-step guide can be found on Instructables.

This works because, in a stuck pixel, the liquid in one or more of its sub-pixels has not spread equally. When your screen"s backlight turns on, different amounts of liquid pass through the pixel to create different colors. When you apply pressure, you"re forcing the liquid out, and when you release the pressure, chances are the liquid will push in, spreading around evenly as it should.

When all attempts to revive your bad pixel fail, the next best thing you can do is to make peace with it. One ugly pixel won"t break your screen, and eventually, you"ll forget about it. If the defect affects more than a single pixel, however, or just bothers you a lot, you can always replace your monitor.

First, check the warranty. The manufacturer or the marketplace where you purchased the monitor might cover dead pixels. Note that most manufacturers define a maximum number of allowable bad pixels for specific resolutions, and the warranty won"t apply until your monitor crosses that threshold.

Bright or dark sub-pixels can occur during the production of the LCD Monitor panel but does not affect the LCD Monitor functionality. The customer may notice the bright or dark spots if the film of the liquid crystal does not perform as expected while customers uses the LCD monitor. However, this is not considered a defect unless the number of bright and dark subpixels exceeds the maximum allowable threshold (...)

On a monitor with over 12 million pixels (Wide QXGA+, 2560x1600 pixels), for example, LG"s pixel policy says that 12 bright or dark sub-pixels is the maximum you have to tolerate.

Should all of these approaches fail to fix your dead pixel warrior, at least you"ll now know it"s not simple to fix, and, you might actually have to replace the screen.